diff --git a/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh b/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
index 2b6c9a97..a76ed5c8 100755
--- a/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
+++ b/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
@@ -3,6 +3,7 @@
 HALF_RES_RESOLUTIONS="240 320 360 480 540 600 1440"
 
 for i in $HALF_RES_RESOLUTIONS; do
+	rm -f $i.zip
 	mkdir $i
 	cd $i
 	if [ -f ../../$(($i/2)).zip ]; then